Paper-calendering device



Aug. 7,' 1928. 1,679,711

A. L. DAWE PAPER CALENDERING DEVI CE Filed Aug. 17, 1927 2 Sheets-Sheet 2 .2 I INVENTOR ARTH UR.L.DAWE Wis .ATTOIL'NE Patented Aug. 7, 1928.

UNITED STATES PATENT OFFICE.

ARTHUR I. DAWEOI' MONTREAL, QUEBEC, CANADA.

PAPILCALINDERING DEVICE.

Application fled August 17, 1927. Serial No. 218,841.

weight of the long rolls and the heavy weights of same which are re iuired to give a suitable finish orgloss totie paper, has a tendency to cause the rolls to sag or deflect at the centre so that the rolls are not quite parallel.

The object of the invention is to provide simple and easily adjusted means which will, when in operatlon, produce a high gloss or finish on one, or both sides of a sheet of paper, without damaging the texture of same.

Another object is to provide means which will allow a reduction in the number and also the size of the rolls in machines of this class, so that the stack of rolls may be made smaller and any tendency for the rolls to sag maybe reduced to aminimum. A further object is to provide a calendering section which may be easily adapted to the present type of machine without much change in the general design of the supporting structures.

Accordin to my invention I provide a plurality o calender rolls which may be arranged in any desired manner, sothat eaclr roll is in contact with the roll, or rolls adjacent thereto, so that paper passing therebetween may be subjecte to a squeezing action. The rolls may be heated or cold if so desired. Mounted on theside frames of the calendering section are brackets which pivotall support the finishing rolls, so that they may equickly and easily brought into and out of contact with the calender rolls. The finishing rolls may be so arranged. that they are brought into contact with both sides of the paper passing between them and the calendering rolls. The finishing rolls are rotated at a difierent circumferential speed from the calendering rolls, so that there will be a slipping or ironing action on the surface of the paper which tends to put a high gloss on the surface of the paper, such as would be obtained by moving a hot iron thereover. The finishing roll driving shaft is mounted at the centre of the pivot, so that the roll may be quickly withdrawn even while the roll is rotating. Means are provided for adjusting the pressures between the finshing rolls and the calendering rolls, and said means may be arranged to lock the finishing rolls in anydesired position.

In the drawings which illustrate my invent 1on:-- 1

Flgure 1 is a side elevation of a calender- 1 mg section of a paper making machine with my improved finishing rolls attached thereto.

Figure 2 is a partial plan of one end of one of the finshing rolls with the driving mechanism'shown in detail. I

Figure 3 is a side elevation of the part of the machine shown in Fi re 2. i Referring more particu arly to the drawngs, 11 designates the frame of the calendermg sectlon of a paper making machine and rotatably mounted in the frame in the usual manner are the rolls 12, which for illustrative purposes are arranged in stack form, that is one above the other with their centres in vertical ali nment, but this arrangement may be modified, if S0 desired. The usual doctors 13 may be provided to cleanethe roll and prevent the paper from doublingxon the.

roll, or otherwise afi'ecting the smoot working of the machine. The paper moves throu h the machine in the direction indicated y the arrows and from the. upper side of the lower roll is taken to a winding drum,

not shown. The rolls may be rotated by any 1 suitable means well known in the art. Secured to the, frame are the brackets 14 and pivotally mounted in said brackets are the finishing roll supporting levers 15. R0- tatably mounted in the ends 16 of the levers are the finlshing, rolls 17. The other end 18 of the lever is connected to means for move mg the levers about their pivots by means of the connecting rods 19, which are made in sections connected together by .a turnbuckle 19' to allow adjustments to be made to the position of the lever. I

In the drawings I have shown a manually operated device for adjusting the position of the finishing rolls, but any other type of mechanism may be employed and said mechanism may be hydraulically or electrically operated, if so desired. In the type shown, brackets 20 are secured to the frame of the machine near the base thereof and rotatably mounted in the said brackets 20 are the spindles 21 which are cash provided with a worm 22, which engages with the teeth of a worm wheel 23Wl1icl1 is mounted between bearings 24 and is threaded to engage with the threaded lower end 25 of the connecting rod. Handwheels 26 are secured to the of the chain 29 and chain sprocket wheels 30 and 31. The spindles 28 are rotatably mounted in bearings 29 coincident with the pivoting centres of the levers, and secured to the spindles 28 are the chain sprocket wheels 30 which drive sprocket wheels 31 through the chains 32. The sprocket wheels 31 are secured to the ends of the finishing rolls 17, which are mounted in antifriction bearings 33 mounted in the ends of the levers. This construction-allows the finishing rolls to be.

adjusted without interferin with or aflecting the driving mechanism or the finishing rolls.

In operation the the rolls of the ca endering machine and moves therethrough in the direction indicated b the arrows. The finishing rolls are then a justed to contact with and press the paper against the calendering rolls by adjusting the position of the fin shin roll supporting levers. In the drawing t e mechanisms shown are of the self locking t being of the doubleworm type. The riving mechanism for the rolls is set in motion to drive the finishing rolls at a different circumfere ntial speed from that of the calendering rolls, so that there is a certain amount of slip or ironing action on the face of the paper adjacent to the finishing roll, which produces a high gloss or finish on the face of the paper. When the calendering rolls are heated in the usual manner, the rubbing action of the finishing rolls produces a gloss somewhat similar to that produced by moving a hot iron over the surface of the paper. The finishing rolls maybe arranged or so mounted on the machine that one or both sides of the paper may be finished with a high gloss.

The device is very sim le in construction and it will be readily un erstood that many modifications may be made in the general construction of the various drivingand adjustin mechanisms without departing from the spirit of the invention.

This arrangement also allows less rolls to aper .is passed around The pressures'between the calendering rolls may be also reduced so that the fibres of the paper may not be subjected to strains 01 pressure which would weaken the paper. The device maybe conveniently and easily attached to the types of calendering machines. at present in use, whether the rolls are arranged .in stack or staggered form. The device here n disclosed is easily ad'- justed and regulated to give any desired pressure on the paper surface, so that the finish of the paper may be made to suit any re uired degree of gloss.

aving thus described my I claim is i I 1. In a paper calendering machine having calendering rolls, a finishing roll adapted invention, what to run at a different circumferential speed to that of.the calendering rolls and in contact with the paper passing therethrough.

2. In a paper calendering machine having,-

a pluralit of calendering rolls, a paper finishing evice adapted to contact with the paper and press same against the calendering rolls, said finishing device being adapted to slip on the paper surface to produce a high gloss thereon.

- 3. In a paper calendering machine having a plurality of calendering rolls, a finishing roll, means to rotate the roll at a different circumferential speed to that of the calenderng rolls, and means for pressing the finishing roll against the calendering rolls.

4. In a paper making machine having a plurality of calendering rolls rotatably mounted therein, a finishing roll adapted to contact with and press the paper passing through the machine against the calendering rolls, means to adjust the pressure of said finishing roll against the paper, and means to drive the finishing roll at a different circuliiiferential speed to that of the calendering ro s.

5. In a paper calendering machine having a lurality of calendering rolls a finishing rol adapted to contact with and press the paper passing through the machine, pivoted levers supporting the finishing roll, means to pivot the lever to adjust the pressure of the finishing roll against the paper and the calendering roll ad acent thereto, and means adapted to rotate the'finishing roll at a different circumferential speed to that of the calendering rolls, said finishing roll being rotatably mounted about the pivot of the levers, so that it is not affected by the movement of the finishing roll.

6. In a calendering machine, plurality of calendering rolls mounted therea frame, a

in, betweeneach of which the paper passes through the machine, a finishingroll rotatably mounted on levers ivotally secured to the frame, means or moving the levers to cause the finishing roll to contact with the pa r passing through the machine and press t e paper against t e calendering roll adjacent to the finishing roll, means to regulate said pressure and means driven through the pivot centre of the lever to rotate the finishing roll ent circumferential calendering rolls.

7. In a calender, a plurality of cooperating rolls adapted to act on a web of paper passing around and between said rolls, means cooperating with one of said rolls adapted to burnish the paper while supported thereon, and means for controlling the pressure of said burnishing means on the paper. 8. In a calender,

speed to that of the a series of superimposed preferably at a differ-v rolls adapted to act and means cooperating with one of the last rolls of said series to burnish the aper passing thereover.

9. In a ca ender, a series of superimposed rolls, guideways for said rolls, a burnisher mounted on said guideways and adapted to cooperate with one of said rolls to act on paper passing therearound, saidburnisher being adapted to permit movement of said rolls in said guideways.

10. In a calender, a series of superimposed rolls, spaced guideways for said rolls, a burnisher supported on said guideways and adaptedto cooperate with one of said rolls to set on paper passing thereover, saidermit upward burnisher being ada ted to movement of said r01 s insai guideways.

In witness whereof, I have hereunto .set

my hand.

ARTHUR L. DAWE. 

